. >>> back here at home and to the economy. you likely don't need us to point out the steep hike in gas prices. the average price of a gallon of gas, $3.68, two months straight now price hikes at the pump. want to bring in "gma" host bianna golodryga. who also covers the economy for us. you're looking into the numbers, they're steep. >> and painful. look at the graphics. inr in -- in just the past week, gas prices have been up 13 cents the past month, 42 cents. these price hikes, if they continue, will cost the average family nearly $400 in addition to what they already pay for the year. >> another 400. in the meantime, do we know why they're going up? >> they're going up because oil prices are going up. but it's a puzzle as to why. but this is not a typical time where you see a lot of demand. they are transitioning to different blends. there are people who think this is speculation from investors, but there's not one clear answer as to why. >> you mentioned the blend. that usually happens spring to summer, will we see more hik